Air filtration device



FIG. 1 is an overall perspective view of an air filtration device;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a left side elevational view thereof;

FIG. 4 is a right side view thereof;

FIG. 5 is a rear view thereof;

FIG. 6 is a top plan view thereof; and,

FIG. 7 is a bottom plan view thereof.

The broken line showing is included for the purpose of illustrating andforms no part of the claimed design.

The ornamental design for an air filtration device, as shown.